def outer():
	x = 10
	
	def inner():
		print x
		
	inner()
	x = 20
	return inner
# end of def outer	
	
result = outer()
print result

var = result()
print var


a = 9
b = 9

if a is b:
	print( "a and b are equal." )
else:
	print( "a and b are not equal." )